describing random bits of metal and debris, the kind of things that could have been picked up from the environment when the woman went off, jenna. jenna: mike, no arrests yet and we're seeing video from the scene that day, how is security in the city of boston? >> reporter: we are really seeing an increase in security. just behind me there is a armored vehicle parked in front of massachusetts general hospital. we see an increase in the yellowjackets of city police officers who are out there. state troopers increased their numbers in the city of boston by 100 to augment the city police there. they're deployed at every hospital. they're deployed at the statehouse and they're deployed at the metro boston transit authority stops. additional troopers have been sent to the airport, jenna. jenna: more on this as we get it. mike, thank you. jon: we are also following some breaking developments out of capitol hill after a letter sent to the office of senator roger wicker tests positive for the potentially fatal substance ricin. peter doocy is live outside the senate mail facility in hyattsville, maryland w